CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	8 Months Ended	12 Months Ended
	Dec. 31, 2018	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (5,320)	$ 127,629	$ 30,525	$ 76,602
Other comprehensive income:
Unrealized gain (loss) from derivative instrument	(2,794)	1,627	0	0
(Gain) loss on derivative instrument reclassified into earnings	159	152	0	0
Total comprehensive income (loss)	(7,955)	129,408	30,525	76,602
Comprehensive (income) loss attributable to noncontrolling interests – Operating Partnership	1,032	(12,888)	(4,059)	(7,032)
Net comprehensive (income) loss attributable to noncontrolling interests – consolidated real estate entities	(110)	1,861	16,881	2,436
Comprehensive income (loss) attributable to controlling interests	$ (7,033)	$ 118,381	$ 43,347	$ 72,006